Contragradient transformation
[计] 逆步变换, 反步变换
🧩 词语组成解析
[计] 逆步的
🗣️ 情景例句
It's tough getting an O.K. from the boss.
很难从老板那听到声“同意”。
What''s the cause of the delay?
什么原因延误？
Mary and lizzy are organizing a large medical conference.
玛丽和莉齐正在组织一个大型的医学会议。